Traditional Sauna Heating with External Feed Convenience and Dual-Room Enjoyment
The Harvia M3 SL WKM3SL wood-burning sauna heater combines authentic sauna performance with the added convenience of an external feed system. Designed for small and medium-sized sauna spaces, this heater allows firewood to be loaded from an adjacent room, creating a cleaner sauna environment while extending the experience beyond the steam room itself.
The external-feed design creates a dual-purpose experience by functioning as both a sauna heater and a fireplace. While the sauna room enjoys rich heat and steam, the adjacent room can benefit from the warm glow visible through the cast-iron framed glass door. Designed and manufactured in Finland, the M3 SL combines traditional sauna atmosphere with practical functionality.
Built for dependable performance and flexible installation, this heater brings warmth and ambiance to multiple spaces.
Key Features
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External Feed Design: Allows firewood loading from an adjacent room.
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Dual-Room Heating Experience: Functions as both a sauna heater and fireplace.
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Wood-Burning Sauna Heater: Provides an authentic traditional sauna atmosphere.
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Cast-Iron Framed Glass Door: Creates visible fire ambiance in the adjoining space.
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Designed for Small and Medium Saunas: Delivers balanced heat and steam performance.
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Floor-Mounted Installation: Stable and practical heater positioning.
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Upper Connection Opening: Supports flexible chimney installation.
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Soot Access Opening: Designed for easier maintenance access.
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Designed and Manufactured in Finland: Built according to Harvia quality standards.
Specifications
Model: WKM3SL
Series: M3 SL
Product Type: Wood-Burning Sauna Heater
Fuel Loading Type: External Feed
Installation Type: Floor Model
Sauna Room Capacity: 212–459 cu. ft.
Stone Capacity Requirement: Minimum 66 lbs
Stone Requirement: 2 Boxes AC3020
Door Type: Cast-Iron Framed Glass Door
Connection Type: Upper Connection Opening
Maintenance Access: Soot Opening
Country of Manufacture: Finland
Specifications
Width: 15.3" (390 mm)
Depth: 25" (640 mm)
Height: 28" (715 mm)
Manufacturer Note: Natural sauna stones vary in shape and size. Additional stones may be recommended for optimal arrangement and performance.
